Apparatus for burning oil



Aug. 13, 1929. l. c. JENNINGS APPARATUS FOR BURNING OIL Original Filed Feb. 20, 1925 2 Sheets-Sheet v Invenfir: 506229 0. Jenn 515,

Aug. 13, 1929. 1. c JENNINGS APPARATUS FOR BURNING OIL Original Filed Feb. 20, 1925 2 Sheets-Sheet 2 MIL- Y mew?- 19062 96. final Jigs;

W W @M Patented Aug. 13, 1929.

UNITED STATES PATENT OFFICE.

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Application filed February 20,1925, Serial No. 10,580. Renewed February 8, 1929.

The object of this inirention is to provide a new and improved apparatus for burning The invention is preferably carried out by the use of an 'air pump constructed to use oil for its. pumping action, the pump being emplo ed both to carburet the'air and to force t e carburetted air and supply of oil to the burner.

The air pump is preferably combined with a separating tank, into which the pump discharges, in which the unvaporized oil is separated from the mixture and fromwhich the carburetted air and the separate supplyr of oil are forced to the burner. he apparatus for practicing the invention is illustrated in the accompanying two sheets of drawings in which,

Figure. 1 is a diagrammatic elevation partly in section, illustrating the apparatus;

Fig. 1a is a detail view showing a slightly modified form of connection herein referred t0, Fig. 2 is a plan view thereof; &

Fig. 3 is a longitudinal sectional elevation of the pump which .is employed; 1

Figs. 4, 5 and 6 are cross sectional views thereof on the lines 44, 5,5, and 66 of Fig. 3; and k Fig. 7 illustrates a detail hereafter referred to.

I preferably employ an air ump of the so-called hydro-turbine t e. his type of pump is well-known in t e art and 1s illustrated in the patent. granted to me March 18, 1919, No. 1,297,692.

Pumps of this type, which 'can be emloyed, are also illustrated in patents to gcheurman, No. 993,346,- dated December 9, 1909; to Gibson, No. 1,099,921, dated June 16, 1924; to Ray," No. 1,172,555, dated February 22, 1916; toSkidmore, No. 1,390,390, dated September 13, 1921; and in British patent to Trane, No. 15,603, of 1911.

The pump which I have illustrated as employed in my apparatus is a modification of the one shown in my said Patent No.

- 1,297,692, and I will describethis pump in detail hereafter, understanding, of course, that practically any hydro-turbine ump, which can be constructed to use oil or its pumping action can be employed to carry out my invention. I

Referring to the drawings and in detail, A designates the hydro-turbine pump. The same is mounted on a hollow base or septurbine pum A..

arating tank B and the rotor of the pump is driven by an electric motor 0. The oil to be burned is laced in a storage tank D, which prefera 1y is arranged at some distance fromthe pumpin apparatus, as under the ground outside of t e building in which the furnace E is contained. The tank D is connected by a supply pipe 10 to a valve F. The valve is connected to the inlet of the pump A. The outlet of the pump A is connected .by a pipe 11 tothe tank B, a forwardly opening check valve 12 being preferably arranged in this pipe.

Anair pipe 13 connects from the top of the tankB to the burner G and an oil pipe 14 also connects from the tank B to the burner, the tank A well burner G nearly to the bottom thereof.

or basin 15 is arranged under the to catch any oil that may drip from or that may be forced out through the burner. An air pipe 16 extends from this well to the valve F. The valve F normally stands as shown in- Fig. 1 so that this air pipe connects to the inlet of the hydro- Screcns 17 may be placed in any or a of the pipes 13, 14 and 16, if desired, to prevent any back-firing through the same.

The inlet of the pump A is further connected b a pipe 18 to the bottom of the tank. T is pipe 18 ma have an adjusting valve 19 in the same,-if desired. The purpose of this pipe is to supply the hydroturbine pump with the make-up oil that is necessary for its operation.

The electric motor C preferably is controlled by a magnetic starter 20. A controlling circuit 21 extends from the starter and this circuit preferably includes a fusible plug 22 arranged near the furnace so that in case of overheating or fire from the furnace the plug will be pump out out of operation.

This circuit 21 also includes one or more the pipe 14 being .carried down in melted and the thermostats 23, arranged to control the opcircuit 25 is connected to the other pole of the switch 24. This shunt circuit 25 is nor- 'mally cut-out of operation, but when the valve 19 is thrown to the position indicated in Fig. 7, the shunt 25 is connected with the magnetic starter and the circuit 21 is cut out for a purpose hereinafter described.

The pump consists of a back plate 30, which contains a bearing for the shaft extending from the electric motor. A port shell 31 and a rotorcasim 32 are attached by screws to the pump back. The pump inlet and the pump out-let are preferably formed integrally with the port shell 31. The port shell is divided by a partition 310, into two compartments, into one of which the inlet connects and from'one of which the outlet extends. The port shell 31 has two inlet ports 3333, and two outlet ports SA -34 formed in its side wall as illustrated in Fig. 5, which ports are arranged concentrically relatively to the axis of thepump. The pump rotor consists of a member having side walls 35 and 36 between which are arranged ribs or partitions 37 so that a series or plurality of displacement chambers is formed therein.

Holes 350 are bored-through the wall 35 into each displacement chamber. These holes are arranged to coincide concentrically with the ports 3333 and 3434. The retor casing 32 is made eliptical as shown in Fig. 6, so that the same has two operating lobes, the lon and the short axes of the pump easing %eing indicated by the lines 3939 and 4040 of Fig. 6.

Suppose the pump casing is partly filled with liquid, then when the rotor is revolved at high speed the liquid will turn around with the rotor and by centrifugal force will follow the contour of the rotor casing. Thus the liquid contained in the pump will move outwardly and inwardly in the displacelnent chambers and the suction and displacement action of the liquid in the cham bers of the rotor will create a powerful pumping efi'ect whereby a suction will be obtained so that fluid or liquid can be drawn into the inlet of the pump, ut under pressure in the pump, and then t brced' out of the outlet thereof. I

I employ this action of a hydro-turbine pump to carburet air for the burner by using the oil td effect the pumping action and by leading air to the pump. The operation of my invention is as follows:

The pump is first partly filledfwith the oil through a plug 41 which is arranged in the pump inlet. The valve F, which is normally in the position shown in Fig. 1,

is thrown over to the position shown in Fig. 7. This movement will also throw over the switch 24: and will start the motor in operation through shunt circuit 25.' The pipe 10 is now connected to the pump inlet. As the hydro-turbine pump has the capacity for handling a liquid as well as a fluid, the pump will now operate as a liquid pump, and the oil will be drawn from the tankD and forced by the pump through pipe 11 into the separating tank B. As soon as-the separating tank B is filled to the desired level, the float 27 operates the electric cut-out 26, opens the circuit 25, and thus stops the motor. This automatic cut-out of the pump prevents flooding. Now the handle is released and the apparatus is ready for normal action. It the thermostat 23 now .closes the circuit 21, the motor will be started in operation and the pump will draw air in through the pipe 16. If any oil has dropped from the burner down into the well 15, the same will first be drawn up bythe pump. The pump will then operate as an air pump. As the air passes through the pump it will be thoroughlycommingled with the oil to beburn ed and will be carburetted to a considerable degree, depending on the quality of the oil, by the agitation of the same in connection with the oil in the pump and by the action of oil in the pump in putting the air under pressure.

The carburetted air will be forced by the pump, through the pipe 11, into the separating tank B, and a considerable body of air will thus be put under pressurein the top of the separating tank B. As more or less of the oil to be burned is used in carburetting the air, and passes along through the.pipe 11, the necessary make-up oil or oil needed to keep the pump in operation will be supplied through the ipe 18, the valve 19 being adjusted to supp y just the proper amount to the pump inlet. The carburetted.

air is led from the top of the storage tank through the pipe 13 to the burner, and a supply of oil to be burned is led from the bottom of the storage tank 13 to the burner through .pipe 14.

The burner may be provided with any of the ordinary pilot lights or electric appliances for keeping the same in operation.

While the pipe 11 might be connected directly to the pipe 13 as indicated in Fig. 1, the preferable arrangement is to connect the pipe 11 to the tank at some distance from the pipe 13 as shown in plan in 2, so that all the carburetted air will ass through thetop of the separating tank. his will allow any unvaporized oil in the carburetted air ormixture to separate out from'the mixture delivered by the pump..

\Vhen the desired degree of heat has been obtained, the thermostat 23 will open the circuit 21 and will stop the motor. The

compressed air in the storage tank B will continue to flow out through the pipe 13 until practically atmospheric reached in the tank. The chec valve 12 in the pipe 11 presents the compressed air after the pump is stopped from flowing backwards through the pump and blowing out the make-up oil therein.

lVhen the thermostat 23 againcloses the circuit 21, the operation is repeated, and thus the space which is to be heated is kept substantially at a constant temperature. I

The only attention which the apparatus requires is that the valve 19 be thrown over to the position shown in Fig. '7 from time to time, as may be necessary, to keep the separating tank filled with oil. It will also be seen that when the separating tank is filled by the pump, it'is impossible to overload or flood the apparatus by reason of the employment of the cut-out 26. Thus the apparatus can be. attended by unskilled persons.

The details and arrangements herein shown and described may be greatly varied by a skilled mechanic without departing from the scope of my invention, as ex pressed in the claims. 7

Having thus fully described my invention, what I desire to claim and cover by Letters Patent, is:

1. A pumping apparatus for anoil burn-' er comprising an air pum constructed to use oil for its pumping action for carburet- 1 ting the air and means whereby the carburetted air from the pump will be led to the burner and whereby the air will force a separatesupply of oil to the burner.

2. A pumpmg apparatus for an oil burner comprising a closed tank, an air pump constructed to use oil for its pumplng action for carburetting the air and for putting oil in the tank under air pressure and means whereby air from the pum will be led to the burner and will force 011 to the burner comprising, an oil connection from the tank, and an air connection, to the burner.

3. A pumping apparatus for an oil burner comprising a closed tank, an air pump constructed to use oil for its dpumping action I structed to use oil the burner,

for carburetting the air an for putting oil in the tank under air-pressure, an oil connection and an air connection from the tank to the burner, and a valve and a connection arranged so that oil can be drawn from a supply by the pump and discharged into the tank.

4. A pumping apparatus for an oil burner comprising a closed tank, an air pump confor its pumping action for putting fuel oil in the tank under air pressure, an air connection and an oil connection from the tank to the burner, a well arranged tocatch any oil dropplng from and an air connection from the ressure is well to the pump arranged to pick up any oil in the well.

5. A pumping apparatus for an oil burner comprising a. closed tank, an air pump con-' structed to use oil for its pumping action and to carburate the air, a connection from the pump to the tank having a check valve opening towards the tank, and an air con- .nection and 'an oil connection from the tank 7. A pumping apparatus for an oil burner comprising a closed tank, an air pump constructed to use oil'for its pumpm action connected to put oil in the tankun er pressure, connections whereby air from the pump will be led to the burner and whereby the air will force a separate supply of oil tothe burner, and a pipe connecting the tank and the pump make-up oil. 7

8. A pumping apparatus for an oil burner comprising a closed tank, an air pump constructed to use oil for its pumping action andto carburet the air, a connection from the pump to the tank, a connection from the tank to the burner arran ed at some distance .from the connection rom the pump to the tank, and a connection from the tank to the burner so that the air wil l force a separate supply of air to the burner.

9. A pumping apparatus for an oil burner comprising a closed tank, an air pump constructed to use oil for its pumping action and to carburet the air, a connection from the pum to the tank, connections, whereby the air rom the pump will be led to the burner-and whereby the air will force a separatesupply of oil to the burner an air inlet to the pump, an oil inlet to the pump, a valve arranged so that either air or oil can be led to the pump, driving the pump, a circuit having a thermostat for controlling the operation of the motor, a separate circuit for controlling the motor when the pump is to be used to force oil to-the tank, and a switch connected to said valve and arranged so that saidseparate circuit will be connected when the pump is to be used to force oil to the tank.

10. A pumping apparatus for. an oil burner comprising a closed" tank, an air pump constructed'to use oil for its pumping action and to carburet the an, a connection,

the pump and discharged for supplying the pump with an electric motor'for from the pump to the tank, connections whereby the air from the pump Will be led to the burner and whereby the air Will force a separate supply of oil to the burner, an

5 air inlet to the pump, an oil inlet to the pump, a valve arranged so that either air or oil can be led to the pump, an electric motor for driving the pump, a circuit having a thermostat for controlling the operation of 10 the motor, a separate circuit for controlling the motor when the pump is to be used to force oil to the tank, a switch connected to said valve and arranged so that said separate circuit will be connected when the pump is to be'used to force oil to the tank, an electric cut-out for this second circuit, and a float in the tank controlling this cut-out.

In testimony whereof -I have hereunto aflixed my signature.

IRVING C. JENNINGS. 

